import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


public class Kreis {

	public static void main(String args[]) throws IOException
	{
		int x = 20;
		int y = 20;
		int ix,iy = 0;
		/*while(iy >= y)
		{
			if(ix== 1 || ix == y)
			{
				
			}
		}*/
	}
}
